Gottfried Wilhelm Leibniz - A Leibniz wheel or stepped drum was a cylinder with a set of teeth of incremental lengths which, when coupled to a counting wheel, was used in the calculating engine of a class of mechanical calculators

Makes You Smarter

An old sketch portrait of Gottfried Wilhelm Leibniz who was a German mathematician and philosopher. He wrote primarily in Latin and French. Leibniz occupies a prominent place in the history of mathematics and the history of philosophy.